So, this is it:
- The *.sketch files are stored in /root/notes
- Additionaly the filenames and thumbnails are stored inside the sqlite database in /root/content.db in the table "notes"
- For a new sketch file to show up you need to copy it to the /root/notes directory _and_ make a new line inside the content.db
- Removing a *.sketch file from /root/notes will not remove it from the scribble app. At least the thumbnail will remain there and when selected, the scribble app acts like when creating a new scribble
The "internal storage" is /media/flash. Did you setup a serial or ssh connection to your M92? Otherwise I could write a small bash script for you that copies the sketch file to the appropriate directory. But we still have to think of a way to edit the sqlite database.